Crystal structures of (S)-(+)-5-(3-bromo/chloro-4-isopropoxyphenyl)-5-methylimidazolidine-2,4-dione

Abstract

The chiral title compounds are closely related hydantoin derivatives with bromo and chloro substituents at the 3-position of the benzene ring of the isopropoxyphenyl subtituent. In the both crystals, hydantoin groups are connected by N—H⋯O hydrogen bonds, forming two-dimensional sheets, made up from (20) rings.